Congratulations on your new bun!

It is very common for very young buns to produce a surplus of soft poopies. If thepoop isnt runny or sticking to his butt and he’s gaining weight like he should, I dont think you need to cut back on pellets in any radical way. You could start mixing up his alfalfa hay with grass hay, so he gets into good hay eating-habits while he’s still young and impressionable.

The soft poop are probably caused by a diet that gives him slightly more protein  than his body is making use of. This can hower change any moment, because young rabbits (and humans and dogs etc) tend to grow in spurts. It’s very difficult not to say impossible to provide a baby bun with the exact right amount of food, no more, no less, which is why free feeding (within reason) is recommended.

Another factor is that a young bunny’s gastrointestinal microbiota (what we used to call gut flora) isnt yet mature ot fully diversified. Especially grass hay will help him develop a sturdy, resilient gut microbiota, but it takes some time.

Totally nothing to add to the diet advice, but had to say look at that baby bunny yawn, he’s just too adorable!

I’m no expert but I agree with Bam given the research I did. Sorry not to have to add anything but I gotta say your bunny is so cute! Congrats on getting them!